High-sealing-performance three-way pipe fitting with stainless steel lining

Abstract

The utility model discloses a high-sealing-performance lining stainless steel three-way pipe fitting, which belongs to the technical field of three-way pipe fittings and comprises a shell and a stainless steel lining. A first annular groove is formed in a port of the stainless steel lining, the first annular groove is sleeved with a movable pipe, the movable pipe is connected with the first annular groove through a spring and an annular air bag, and an inflation sealing ring is arranged on the movable pipe and communicated with the annular air bag. When the three-way pipe fitting is connected with other pipelines, the ports of the other pipelines can be in close contact with the movable pipe and extrude the movable pipe, and meanwhile, the movable pipe extrudes the annular air bag to inflate the inflatable sealing ring, so that the sealing performance of the contact positions of the other pipelines and the movable pipe is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of three - way pipe fittings, and particularly relates to a high - tightness stainless - steel - lined three - way pipe fitting. Background Technique

[0002] Three - way pipe fittings are used at places where the main pipeline needs to branch to other pipelines. It has equal - diameter and different - diameter types, and can be classified in various ways according to pipe diameter, connection form, material, and branch - pipe form, etc. The basic structure of a three - way pipe fitting consists of three ports or interfaces, and is commonly used to connect two or more pipelines to achieve the transmission or distribution of fluids or gases between multiple pipelines.

[0003] Currently, when connecting current three - way pipe fittings to other pipelines, flange connection is mostly used. However, flange connection has relatively high installation requirements. If the installation is not in place or the quality of the flange parts and gaskets is poor, it will lead to pipeline leakage points. Moreover, after long - term use, the flange is prone to damage, looseness, etc., resulting in water leakage at the connection position. Content of the Utility Model

[0004] To solve the above - mentioned technical problems, the utility model provides a high - tightness stainless - steel - lined three - way pipe fitting.

[0005] The technical solution of the utility model is: a high - tightness stainless - steel - lined three - way pipe fitting, the three - way pipe fitting includes a shell and a stainless - steel lining arranged inside the shell; at each of the three ports of the stainless - steel lining, a first annular groove is provided, an activity tube is sleeved on the first annular groove in a limited - sliding manner, one end of the activity tube is connected to the first annular groove through a spring and an annular airbag, an inflatable sealing ring is provided on the activity tube, and the inflatable sealing ring is communicated with the annular airbag through a pipeline.

[0006] Note: When the above - mentioned three - way pipe fitting is connected to other pipelines, the other pipelines can contact and squeeze the activity tube. The activity tube will contract and tightly contact the ports of the other pipelines under the action of the spring. At the same time, the activity tube will squeeze the annular airbag, so that the gas in the annular airbag enters the inflatable sealing ring. After the inflatable sealing ring is inflated, the tightness of the contact position between the other pipelines and the activity tube will be improved.

[0007] Furthermore, the other end of the activity tube has a reducing pipe with a frustum - shaped cross - section.

[0008] Note: The side wall of the reducing pipe can be tightly attached to the ports of the other pipelines, improving the tightness between the activity tube and the other pipelines.

[0009] Furthermore, a flange is sleeved at the port of the shell.

[0010] Note: Through the flange, it can be ensured that other pipelines are tightly connected to the shell, ensuring the connection strength, and being easy to disassemble and replace.

[0011] Furthermore, a first limiting ring is provided at one end of the movable pipe, and a second limiting ring for cooperating with the first limiting ring to prevent the movable pipe from falling off is provided at one end of the first annular groove.

[0012] Note: The cooperation between the second limiting ring and the first limiting ring can effectively prevent the movable pipe from falling out of the annular groove.

[0013] Furthermore, a second annular groove is provided on the second limiting ring, a V-shaped sealing ring is sleeved on the second annular groove, and a pressing ring for pressing the V-shaped sealing ring by the compression of an annular airbag is provided on one side of the second annular groove.

[0014] Note: When other pipes squeeze the movable pipe, the movable pipe will squeeze the annular airbag, causing the pressing ring to squeeze the V-shaped sealing ring, so that the V-shaped sealing ring closely adheres to the pipe wall of the movable pipe, preventing liquid from entering the cavity.

[0015] Furthermore, the apex angle of the reducing pipe is 30 to 60°.

[0016] Note: Limiting the apex angle of the reducing pipe can ensure that other pipes are in close contact with the side wall of the reducing pipe.

[0017] The beneficial effects of the present utility model are as follows:

[0018] (1) When the tee pipe fitting of the present utility model is connected to other pipes, the port of the other pipe can be in close contact with and squeeze the movable pipe. At the same time, the movable pipe will squeeze the annular airbag, causing the inflatable sealing ring to inflate, so as to improve the sealing performance at the contact position between the other pipe and the movable pipe.

[0019] (2) When other pipes squeeze the movable pipe, the movable pipe will squeeze the annular airbag, causing the pressing ring to squeeze the V-shaped sealing ring, so that the V-shaped sealing ring closely adheres to the pipe wall of the movable pipe, preventing liquid from entering the cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of Embodiment 1 of the present utility model;

[0021] Figure 2 is a schematic diagram of the docking of Embodiment 1 of the present utility model with other pipes;

[0022] Figure 3 is Figure 2 an enlarged view of part A;

[0023] Figure 4 is a schematic diagram of the structure of the movable pipe of Embodiment 1 of the present utility model;

[0024] Figure 5 is a schematic diagram of the structure of the V-shaped sealing ring of Embodiment 2 of the present utility model;

[0025] Among them, 1 - outer shell, 11 - flange, 2 - stainless steel inner lining, 21 - first annular groove, 22 - movable pipe, 221 - reducing pipe, 222 - first limiting ring, 231 - second annular groove, 23 - second limiting ring, 231 - second annular groove, 24 - inflatable sealing ring, 25 - annular airbag, 26 - V-shaped sealing ring, 27 - pressing ring, 28 - cavity. Specific embodiments

[0026] The following further details the present utility model in combination with specific embodiments to better reflect the advantages of the present utility model.

[0027] Example 1: As Figure 1 shown, a high-sealing inner-lined stainless steel three-way pipe fitting, the three-way pipe fitting includes an outer shell 1 and a stainless steel inner lining 2 arranged inside the outer shell 1; as Figure 2 , Figure 3 shown, first annular grooves 21 are provided at the three ports of the stainless steel inner lining 2, movable pipes 22 are sleeved on the first annular grooves 21 in a limited sliding manner, a spring and an annular airbag 25 are used to connect between the right end of the movable pipe 22 and the left end of the first annular groove 21, an inflatable sealing ring 24 is provided on the movable pipe 22, and the inflatable sealing ring 24 and the annular airbag 25 are communicated through a gas passage; the gas passage is arranged inside the movable pipe 22;

[0028] As Figure 4 shown, the left end of the movable pipe 22 has a reducing pipe 221 in a frustum shape, the inflatable sealing ring 24 is sleeved on the reducing pipe 221, a first limiting ring 222 is provided at one end of the movable pipe 22, and a second limiting ring 23 for cooperating with the first limiting ring 222 to prevent the movable pipe 22 from falling off is provided at one end of the first annular groove 21; a flange 11 is sleeved at the port of the outer shell 1; the apex angle of the reducing pipe 221 is 30°.

[0029] The working principle of the above three-way pipe fitting is as follows: When other pipes are docked with the three-way pipe fitting, the outer shell 1 is connected to other pipes through the flange 11, the ports of other pipes will squeeze the movable pipe 22, causing the movable pipe 22 to contract. The movable pipe 22 will be closely attached to the ports of other pipes under the action of the spring, ensuring that the side wall of the movable pipe 22 is closely attached to the ports of other pipes. At the same time, the movable pipe 22 will squeeze the annular airbag 25, and the gas in the annular airbag 25 will enter the inflatable sealing ring 24 through the gas passage, causing the inflatable sealing ring 24 to expand and block the contact position between the movable pipe 22 and other pipes, improving the sealing performance between the movable pipe 22 and other pipes.

[0030] Example 2: As Figure 5As shown, this embodiment is basically the same as Embodiment 1, except that there is a cavity 28 communicating with the annular airbag 25 between the first limiting ring 222 and the second limiting ring 23. A second annular groove 231 is provided on the second limiting ring 23. A V-shaped sealing ring 26 is sleeved on the second annular groove 231. And a pressing ring 27 for inflating the cavity 28 with the annular airbag 25 being pressed to squeeze the V-shaped sealing ring 26 is provided on the right side of the second annular groove 231. The pressing ring 27 is slidably and sealingly connected to a chute provided on the second annular groove 231. The gas passage communicates with the annular airbag 25 through the cavity 28.

[0031] The working principle of the above-mentioned pressing ring 27 is as follows: when the annular airbag 25 is pressed, the gas in the annular airbag 25 will enter the inflatable sealing ring 24 through the cavity 28. As the air pressure in the cavity 28 increases, the pressing ring 27 will move leftward under the action of the air pressure and squeeze the V-shaped sealing ring 26, so as to improve the sealing performance between the V-shaped sealing ring 26 and the inner wall of the movable tube 22 and prevent the liquid from flowing into the cavity 28.

[0032] Embodiment 3: This embodiment is basically the same as Embodiment 2, except that the pressing ring 27 is an inflatable airbag, and the pressing ring 27 is fixedly connected to the second annular groove 231. The pressing ring 27 communicates with the cavity 28, which is not shown in the figure.

[0033] The working principle of the above-mentioned pressing ring 27 is as follows: when the annular airbag 25 is pressed, the gas in the annular airbag 25 will enter the inflatable sealing ring 24 and the pressing ring 27 through the cavity 28, and the pressing ring 27 is inflated and expanded to squeeze the V-shaped sealing ring 26.

Claims

1. A high-sealing stainless steel-lined three-way pipe fitting, characterized in that, The three-way pipe fitting includes a housing (1) and a stainless steel inner lining (2) provided inside the housing (1); at three ports of the stainless steel inner lining (2), first annular grooves (21) are provided, and movable pipes (22) are sleeved on the first annular grooves (21) in a limited sliding manner. One end of the movable pipe (22) is connected to the first annular groove (21) through a spring and an annular airbag (25). An inflatable sealing ring (24) is provided on the movable pipe (22), and the inflatable sealing ring (24) is communicated with the annular airbag (25) through a gas passage.

2. The high-sealing inner-lined stainless steel three-way pipe fitting according to claim 1, characterized in that, The other end of the movable pipe (22) has a reducing pipe (221) in a frustum shape.

3. A highly sealed stainless steel lined three-way pipe fitting according to claim 1, characterized in that, A flange (11) is sleeved at the port of the housing (1).

4. A highly-sealed stainless steel-lined three-way pipe fitting according to claim 2, characterized in that, One end of the movable pipe (22) is provided with a first limiting ring (222), and one end of the first annular groove (21) is provided with a second limiting ring (23) for cooperating with the first limiting ring (222) to prevent the movable pipe (22) from falling off.

5. The high-sealing inner-lined stainless steel three-way pipe fitting according to claim 4, characterized in that A second annular groove (231) is provided on the second limiting ring (23), a V-shaped sealing ring (26) is sleeved on the second annular groove (231), and a pressing ring (27) for pressing the V-shaped sealing ring (26) by the compression of the annular airbag (25) is provided on one side of the second annular groove (231).

6. The high-sealing inner-lined stainless steel three-way pipe fitting according to claim 2, wherein The apex angle of the reducing pipe (221) is 30 to 60°.

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